It occurs to me you could probably manage it without too much in the way of Segway-esque magic. Have the outer shell as you'd expect, basically a big hamster ball, then a second ball inside it with all the clever stuff.

For the inside inside have most of the lower half be ballast of some sort - battery packs would be ideal for that - then 8 or so wheels pushing against the outer shell so you can move in a decent number of directions (might have to retract the wheels perpendicular to the direction of movement unless there's a more elegant solution I'm missing).

Then finally for the upper half make a very smooth dome, put a little cart on it whose position you can adjust with a couple of cables, stick a couple of strong magnets on the cart (need a motor on the cart too so you can rotate the head).

This is all based on my years of not having done anything remotely connected to model building!

What the hell !!?!
Nice welcome to the sift... NOT

This is NOT my video. Please retract your ban.

<retracted...point made and no need to kick a man when he's down>

new idea, crews of 3, and one person can retract the bucket when the others are about to DIE

Why must you always jump to negative conclusions about things you know barely anything about?

EDIT:8.3 on IMDB http://www.imdb.com/title/tt0046268/
100% on RottenTomatoes http://www.rottentomatoes.com/m/wages_of_fear

...Unless it being French counts as "good reason"...in which case I retract my question. ;-)

Find it somewhere legal and you post it...all I find is P2P hosting, and screw that. It's copy written, and they still protect it for good reason, that's why it's not on Youtube. It was on Netflix, not sure if it still is. I bought it.

I retract my statement that I will upvote any video with a dancing girl.

<retracted>
Edit: I find that position a disgusting hateful ignorant position to hold.
Ever consider maybe Hamas needs to take their land back? It was theirs first.

<retracted and re-written>
Perhaps each state could make a ballot initiative (those states that allow them) making it illegal for domestic police to use ANY equipment made specifically for the military? I'd vote yes.

Creepy. I issue general directive #27 that all these will retract their eyes immediately and in the future not use this technique.

it's been a really bad week for my back and lots of meds have been needed, which impairs my math skills. My mistake there...and I've retracted that....and I apologize.

It's no problem. It's completely understandable for what you're going through over there. I'll say a prayer for you and your family. Hopefully some pain free days are coming your way soon.

Doing the math correctly, I see you ARE right that it's about 400 times the distance.
But they (and so you) are wrong that it's 400 times the "size". You are right that the radiuses/diameters are a ratio of 400-1. That's different from size, even 2d size.
It may seem semantical, but to me it's an important distinction. This is what I took issue with mostly, since I was CERTAIN the actual "size" (in 3D) is no where near a ratio of 400-1, but closer to 64 million -1. Even in 2D it's nothing like 400-1.

Point taken..you were just trying to be accurate in the way the terms were defined.

Also, I'm not intentionally ignoring your point, it is an interesting fact that the ratios are close, but only coincidental IMO, certainly not 'proof' of anything supernatural.
EDIT: even if they were a perfect ratio, it would only suggest a physical law of motion we don't know or fully understand yet.
I would be interested to see a list of other planets and their moons to see if any other planet/moon (or combination of moons) in our solar system shows the same ratios. Neither answer would make me think anything supernatural however, it's just not that kind of question in my eyes.

Taken by itself, it is an extraordinary coincidence if you deem it as such. Yet, when you pile on the many other factors that have to line up for us to have life here, I find coincidence isn't the appropiate word. Now, some say that because it is such a huge Universe, there are bound to be planets like these (which isn't proven, btw)..and we shouldn't be surprised to find ourselves on one of them because we would expect to find conditions which allow for our existence, given that we exist. I don't think that is a persausive argument.

There is a good analogy about this that I borrowed from the net:

"Suppose you are to be executed by a firing squad of 100 trained marksmen, all of them aiming rifles at your heart. You are blindfolded; the command is given; you hear the deafening roar of the rifles. And you observe that you are still alive. The 100 marksmen missed!"

Taking off the blindfold, you do not observe that you are dead. No surprise there: you could not observe that you are dead. Nonetheless, you should be astonished to observe that you are alive. The entire firing squad missed you altogether! Surprise at that extremely improbable fact is wholly justified - and that calls for an explanation. You would immediately suspect that they missed you on purpose, by design."

Yes...you are correct....I either did my distance-math backwards, or missed a button entering the distance to the moon into my calculator...it's been a really bad week for my back and lots of meds have been needed, which impairs my math skills. My mistake there...and I've retracted that....and I apologize.
Doing the math correctly, I see you ARE right that it's about 400 times the distance.
But they (and so you) are wrong that it's 400 times the "size". You are right that the radiuses/diameters are a ratio of 400-1. That's different from size, even 2d size.
It may seem semantical, but to me it's an important distinction. This is what I took issue with mostly, since I was CERTAIN the actual "size" (in 3D) is no where near a ratio of 400-1, but closer to 64 million -1. Even in 2D it's nothing like 400-1.

Also, I'm not intentionally ignoring your point, it is an interesting fact that the ratios are close, but only coincidental IMO, certainly not 'proof' of anything supernatural.
EDIT: even if they were a perfect ratio, it would only suggest a physical law of motion we don't know or fully understand yet.
I would be interested to see a list of other planets and their moons to see if any other planet/moon (or combination of moons) in our solar system shows the same ratios. Neither answer would make me think anything supernatural however, it's just not that kind of question in my eyes.

Radius is not size.
<retracted>
Stories are not evidence.
The man in the video doesn't understand 'science' at all.
Enough said.

EDIT: retracted and I stand corrected.